spapr.h: increase FDT_MAX_SIZE

Certain SMP topologies stress, e.g. 1 thread/core, 2048 cores and
1 socket, stress the current maximum size of the pSeries FDT:

Calling ibm,client-architecture-support...qemu-system-ppc64: error
creating device tree: (fdt_setprop(fdt, offset,
"ibm,processor-segment-sizes", segs, sizeof(segs))): FDT_ERR_NOSPACE

2048 is the default NR_CPUS value for the pSeries kernel. It's expected
that users will want QEMU to be able to handle this kind of
configuration.

Bumping FDT_MAX_SIZE to 2MB is enough for these setups to be created.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20210408204049.221802-3-danielhb413@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 49a79fbf96581eca5984a811c20f7a94b7131642..7f40a158f42ecc7a43c140b014d04a9950c21914 100644 (file)
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -95,7 +95,7 @@ typedef enum {
 #define SPAPR_CAP_FIXED_CCD             0x03
 #define SPAPR_CAP_FIXED_NA              0x10 /* Lets leave a bit of a gap... */
 
-#define FDT_MAX_SIZE                    0x100000
+#define FDT_MAX_SIZE                    0x200000
 
 /*
  * NUMA related macros. MAX_DISTANCE_REF_POINTS was taken